<!--父级组件：控制除登录页以外的所有页面的共有头部与左侧菜单栏-->
<template>
  <div style="display: flex">
    <div :style="{width:(isCollapse ? '64px' : '208px')}">
    <!--    左侧菜单栏   -->
      <el-menu
      background-color="#3C82F5"
      text-color="#fff"
      active-text-color="#ff0"
      style="width:100%;height:100vh"
      unique-opened
      :collapse="isCollapse"
      :collapse-transition="false"
      router
      >
      <!--   左侧菜单顶部条     -->
        <el-row style="padding-top: 10px">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 7px">
            <el-avatar src="/imgs/admin/logo.png" style="width:35px;height:35px" />
          </el-col>
          <el-col :span="isCollapse ? 0 : 13">
            <span style="color: #fff;font-width: bold;position: relative;top:8px;left: 2px">智慧车辆</span>
          </el-col>
        </el-row>

        <!--   左侧菜单     -->
        <el-sub-menu index="1">
          <template #title>
            <el-icon style="font-size: 21px"><User/></el-icon>
            <span>用户管理</span>
          </template>
          <el-menu-item index="/user">用户列表</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="2">
          <template #title>
            <el-icon style="font-size: 21px"><Van/></el-icon>
            <span>车辆管理</span>
          </template>
          <el-menu-item index="vehicle">车辆列表</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="3">
          <template #title>
            <el-icon style="font-size: 21px"><Location/></el-icon>
            <span>围栏管理</span>
          </template>
          <el-menu-item index="geofence">电子围栏</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="4">
          <template #title>
            <el-icon style="font-size: 21px"><Place/></el-icon>
            <span>调度管理</span>
          </template>
          <el-menu-item index="application">用车申请</el-menu-item>
          <el-menu-item index="audit">用车审批</el-menu-item>
          <el-menu-item index="distribute">车辆分配</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="5">
          <template #title>
            <el-icon style="font-size: 21px"><MessageBox/></el-icon>
            <span>字典管理</span>
          </template>
          <el-menu-item index="dict">字典列表</el-menu-item>
        </el-sub-menu>

      </el-menu>
    </div>

    <!--    右侧区域   -->
    <div :style="{width:(isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px)')}">
      <!--    右侧顶部条   -->
      <el-header style="height: 10vh;background-color: #fff;padding-top: 22px">
        <el-row>
          <!--    折叠图标     -->
          <el-col :span="18">
            <el-icon style="font-size: 21px" @click="changeCollapse" ><Expand/></el-icon>
          </el-col>
          <!--  个人用户   -->
          <el-col :span="6" style="position: relative">
            <el-dropdown trigger="click" style="position: absolute;right: 20px">
              <span style="font-size: 19px;font-weight: bold">
                {{user.username}}
                <el-icon>
                  <arrow-down />
                </el-icon>
              </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
        </el-row>

        <!--    面包屑导航    -->
        <el-breadcrumb separator="/" style="position: relative;top:20px">
          <el-breadcrumb-item>首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb" :key="item">{{item}}</el-breadcrumb-item>
        </el-breadcrumb>
      </el-header>


      <el-main style="height:90vh;padding:0;overflow-y:auto;">
      <!--    右侧可变区域   -->
        <router-view/>
      </el-main>
    </div>
  </div>














</template>
<script setup>
import {onMounted, ref} from "vue";
import {useRoute, useRouter} from "vue-router";

//定义变量isCollapse,用来控制左侧菜单栏是否折叠
const isCollapse = ref(false);
const changeCollapse = () => {
  isCollapse.value = !isCollapse.value;
}

//获取当前登录人的数据
const user=window.getUser()

//退出登录
const logout=()=>{
  if (confirm('确定退出登录吗？')){
    localStorage.removeItem('user');
    window.location.href='/login';
    user.value='';
  }
}

//定义数字用来保存当前面包屑导航显示的值
const breadcrumb = ref(['用户哈哈','用户嘻嘻'])
let map ={
  '/user':['用户管理','用户列表'],
  '/vehicle':['车辆管理','车辆列表'],
  '/geofence':['围栏管理','电子围栏'],
  '/application':['调度管理','申请列表'],
  '/audit':['调度管理','调度审核'],
  '/distribute':['调度管理','用车分配'],
  '/dict':['字典管理','字典列表'],
  '/geofenceMap':['围栏管理','围栏绘制'],
  '/dictOption':['字典管理','字典项列表']
};

//userRoute()是Vue-router提供的一个方法，用于获取当前路由对象
const route = useRoute();
//自定义更新面包屑值的方法
const updateBreadcrumb = () =>{
  //从当前路由对象中获取当前的路径path
  const path = route.path;
  //根据path更新面包屑显示的值
  breadcrumb.value = map[path];
}
//一进入页面就立即调用更新面包屑导航值的函数，只有在第一次进入页面时调用
onMounted(()=>{
  updateBreadcrumb()
})
//获取路由守卫,监听路由,只要path发生了改变(包含点击左侧菜单栏),就立即更新面包屑
const router = useRouter();
router.beforeEach((to,from,next)=>{
  updateBreadcrumb();
  next();
})










</script>